ASTRONOMY WEBQUEST…… EXPLORE THE UNIVERSE
... Universe - http://starchild.gsfc.nasa.gov/docs/StarChild/universe_level2/universe.html Using the website find the following box and Click on the topics to find your answers: The Milky Way ...
... Universe - http://starchild.gsfc.nasa.gov/docs/StarChild/universe_level2/universe.html Using the website find the following box and Click on the topics to find your answers: The Milky Way ...
Astronomy Problems – Color Index Nov. 2011
... Astronomers measure the brightness of stars at three colors of light: The "U" band at 360 nm The "B" band at 440 nm The "V" band at 540 nm The "color index" of a star is defined as the magnitude in the B filter, minus the magnitude in the V filter. Color Index = B-V, where B and V refer to the ...
... Astronomers measure the brightness of stars at three colors of light: The "U" band at 360 nm The "B" band at 440 nm The "V" band at 540 nm The "color index" of a star is defined as the magnitude in the B filter, minus the magnitude in the V filter. Color Index = B-V, where B and V refer to the ...
lecture23
... All stars in a cluster are at about same distance from Earth. All stars in a cluster are of about the same age. Clusters therefore are natural laboratory in which mass, rather than age, of stars is only significant variable. ...
... All stars in a cluster are at about same distance from Earth. All stars in a cluster are of about the same age. Clusters therefore are natural laboratory in which mass, rather than age, of stars is only significant variable. ...
Stars and Their Characteristics
... properties of the body or by its gravitational effect on the bodies around it – more mass = more gravitational effect ...
... properties of the body or by its gravitational effect on the bodies around it – more mass = more gravitational effect ...
Review 1 Solutions
... does not reflect to a single focus point for this shape. It can be corrected by using parabolic mirrors instead of spherical ones. 10. Why do stars twinkle? Stars appear to twinkle from the ground because Earth’s atmosphere subtly bends the starlight (this is due to refraction; it is not a gravitati ...
... does not reflect to a single focus point for this shape. It can be corrected by using parabolic mirrors instead of spherical ones. 10. Why do stars twinkle? Stars appear to twinkle from the ground because Earth’s atmosphere subtly bends the starlight (this is due to refraction; it is not a gravitati ...
Lecture 13: The stars are suns
... • Apparent brightness is not a measure of the luminosity (in watts) of a star. Star of given brightness could be: dim but close, or luminous and distant. • Inverse Square Law for light tell us that the flux is inversely proportional to the distance squared: f= ...
... • Apparent brightness is not a measure of the luminosity (in watts) of a star. Star of given brightness could be: dim but close, or luminous and distant. • Inverse Square Law for light tell us that the flux is inversely proportional to the distance squared: f= ...
The HR Diagram
... • Where are stars most of their lives? • Where are they when they begin to die? • What are they after they use up their ...
... • Where are stars most of their lives? • Where are they when they begin to die? • What are they after they use up their ...
Constellations
... Asterism: Smaller groups of stars that form patterns within a constellation, from the Greek word aster, meaning star ...
... Asterism: Smaller groups of stars that form patterns within a constellation, from the Greek word aster, meaning star ...
Discussion Activity #10
... 1/40 of an arcsecond. What can you say about the relative positions of stars A and B? A. B. C. D. ...
... 1/40 of an arcsecond. What can you say about the relative positions of stars A and B? A. B. C. D. ...
astrophysics 2009
... -in order of increasing size, they are Pluto, Mercury, Mars, Venus, Earth, Uranus, Neptune, Saturn and Jupiter. -the moons or natural satellites orbit the planets. -between Mars and Jupiter there is a gap that is filled with many smaller bodies called asteroids or minor planets. -Comets are of a mix ...
... -in order of increasing size, they are Pluto, Mercury, Mars, Venus, Earth, Uranus, Neptune, Saturn and Jupiter. -the moons or natural satellites orbit the planets. -between Mars and Jupiter there is a gap that is filled with many smaller bodies called asteroids or minor planets. -Comets are of a mix ...
The Hertzsprung-Russell Diagram
... between brightness and temp. Hotter things are brighter Hotter temp = more energy is radiated. Bigger stars are brighter. Bigger surface area = more energy radiated. ...
... between brightness and temp. Hotter things are brighter Hotter temp = more energy is radiated. Bigger stars are brighter. Bigger surface area = more energy radiated. ...
Chapter 24 Vocabulary
... mythological character, or other object and is thus named for it 2. magnitude- in earthquake studies, a measure of the energy released by an earthquake; the Richter scale is used to describe earthquake magnitude 3. parallax- the apparent shift in position of an object when viewed from two different ...
... mythological character, or other object and is thus named for it 2. magnitude- in earthquake studies, a measure of the energy released by an earthquake; the Richter scale is used to describe earthquake magnitude 3. parallax- the apparent shift in position of an object when viewed from two different ...
stars - Legacy High School
... 18. When nuclear fusion is occurring in a star, the element_____________ fuses to form______________. 19. When objects are moving away, the spectrum lines are displaced toward longer wavelengths of light, this is called a ______________shift. 20. When objects are toward earth, the spectrum lines are ...
... 18. When nuclear fusion is occurring in a star, the element_____________ fuses to form______________. 19. When objects are moving away, the spectrum lines are displaced toward longer wavelengths of light, this is called a ______________shift. 20. When objects are toward earth, the spectrum lines are ...
Word - Sam Davyson
... answer will always be greater than 1 suggesting a greater observed than emitted distance. Once again the is determined from the movement of the black lines in the spectrum. The fact that everything measured shows a > 0 indicates that the distances between every pair of objects is increasing (e ...
... answer will always be greater than 1 suggesting a greater observed than emitted distance. Once again the is determined from the movement of the black lines in the spectrum. The fact that everything measured shows a > 0 indicates that the distances between every pair of objects is increasing (e ...
Astronomy 1 Study Guide Key 16
... 7. A galaxy is a collection of stars. Our galaxy is called the Milky Way. 8. It has many solar systems with in its arms. At the center of our spiral galaxy is a black hole, so our galaxy is also called a quasar. Stars Be able to read an H-R diagram. ...
... 7. A galaxy is a collection of stars. Our galaxy is called the Milky Way. 8. It has many solar systems with in its arms. At the center of our spiral galaxy is a black hole, so our galaxy is also called a quasar. Stars Be able to read an H-R diagram. ...
1. a) Astronomers use the parallax method to measure
... 6. I measured the speed of a galaxy 100 million parsecs (100 Mpc) from here to be 7000 km/sec. a) What sort of a measurement did I make to determine that speed? I measured the Doppler shift. That is, I measured the shift in the spectrum to longer wavelengths from what was emitted. With our balloons ...
... 6. I measured the speed of a galaxy 100 million parsecs (100 Mpc) from here to be 7000 km/sec. a) What sort of a measurement did I make to determine that speed? I measured the Doppler shift. That is, I measured the shift in the spectrum to longer wavelengths from what was emitted. With our balloons ...
KMS Universe Test Study Guide
... 1) Spectral Analysis—when we look at different elements through diffraction lenses (3-d glasses), what do we learn? Do all elements appear similar when viewed in this way? Through Spectral Analysis we learn what colors represent individual elements. The elements each have a specific and individual p ...
... 1) Spectral Analysis—when we look at different elements through diffraction lenses (3-d glasses), what do we learn? Do all elements appear similar when viewed in this way? Through Spectral Analysis we learn what colors represent individual elements. The elements each have a specific and individual p ...
Ch 28 Vocab cnp
... Chapter 28: Stars and Galaxies A halo of gases that is formed by the expelled layers of a star’s atmosphere The brightness of a star The measure of how bright a star would be if it were located 10 parsecs from Earth A group of millions, or even billions of stars held together by gravity A unit of me ...
... Chapter 28: Stars and Galaxies A halo of gases that is formed by the expelled layers of a star’s atmosphere The brightness of a star The measure of how bright a star would be if it were located 10 parsecs from Earth A group of millions, or even billions of stars held together by gravity A unit of me ...
parallax and triangulation
... Celestial Bodies? • Use Stellarium to observe the sky and discuss what observations you might be able to use to determine which objects are closest to Earth. • Do size and brightness always lead to accurate conclusions about the distances between Earth and objects out in space? ...
... Celestial Bodies? • Use Stellarium to observe the sky and discuss what observations you might be able to use to determine which objects are closest to Earth. • Do size and brightness always lead to accurate conclusions about the distances between Earth and objects out in space? ...
ASTRONOMY 313
... 2. Suppose that a white light flare is observed on the Sun, originating from a massive sunspot complex that was transiting the Earth-facing hemisphere of the Sun at the time. Roughly 60 hours later, during the evening hours, sky observers all over North America witness spectacular displays of the n ...
... 2. Suppose that a white light flare is observed on the Sun, originating from a massive sunspot complex that was transiting the Earth-facing hemisphere of the Sun at the time. Roughly 60 hours later, during the evening hours, sky observers all over North America witness spectacular displays of the n ...
Homework, August 29, 2002 AST110-6
... e. Which star has the highest surface temperature? f. Which star has the lowest surface temperature? g. Which star is most similar to the Sun? h. Which star is a red supergiant? i. Which star has the largest radius? j. Which stars have finished burning hydrogen in their cores? k. Among the main-sequ ...
... e. Which star has the highest surface temperature? f. Which star has the lowest surface temperature? g. Which star is most similar to the Sun? h. Which star is a red supergiant? i. Which star has the largest radius? j. Which stars have finished burning hydrogen in their cores? k. Among the main-sequ ...
The Inverse Square Law and Surface Area
... period. This allows us to use trigonometry to find its distance. The angles are extremely small. This direct method is the most accurate way of determining distance ...
... period. This allows us to use trigonometry to find its distance. The angles are extremely small. This direct method is the most accurate way of determining distance ...
Malmquist bias
The Malmquist bias is an effect in observational astronomy which leads to the preferential detection of intrinsically bright objects. It was first described in 1922 by Swedish astronomer Gunnar Malmquist (1893–1982), who then greatly elaborated upon this work in 1925. In statistics, this bias is referred to as a selection bias and affects the survey results in a brightness limited survey, where stars below a certain apparent brightness are not included. Since observed stars and galaxies appear dimmer when farther away, the brightness that is measured will fall off with distance until their brightness falls below the observational threshold. Objects which are more luminous, or intrinsically brighter, can be observed at a greater distance, creating a false trend of increasing intrinsic brightness, and other related quantities, with distance. This effect has led to many spurious claims in the field of astronomy. Properly correcting for these effects has become an area of great focus.